@article{10_4064_cm_59_1_157, author = { }, title = {Probl\`emes}, journal = {Colloquium Mathematicum}, pages = {157--157}, publisher = {mathdoc}, volume = {59}, number = {1}, year = {1990}, doi = {10.4064/cm-59-1-157}, language = {fr}, url = {http://geodesic.mathdoc.fr/articles/10.4064/cm-59-1-157/} }